已知抛物线
,其上一点
到焦点
的距离为
.
(1)求
的标准方程;
(2)若直线
与抛物线
交于
、
两点,且以
为直径的圆与
轴相切,求该圆的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5975ba4e093e3eed64434596d945d4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738053bd0217fad1657515ea93464471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54623bccef254857ad663fe6d18f320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2023-02-16 10:51:22
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知点
,点
在
轴上运动,过点
作
交
轴于点
,延长
到点
,使
.
(1)求动点
的轨迹
的方程;
(2)在(1)中所求的曲线
上有三点
,
,
,若
,
,
成等差数列,求线段
的中垂线与
轴交点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd095a80c3c04bf01f7761efb9c96f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b92af19948580ad7a80a41e09da6b41.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在(1)中所求的曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6c51d0b1a90c2121b0dc8e20ad30af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6050b7ee89e71e1bda14bed616995296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f20a5abdb5deef164c7d633c2c8fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530b46eaf82365b2261726e663970a91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f20bf927d76ca5c9679922cc89f489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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名校
【推荐2】已知
为抛物线
的焦点,直线
与
相交于
两点.
若
,求
的值;
点
,若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147e216b76b0ac301f6ad2c78dea57b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a8d6991873e79b298984a95b8954b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482592d5ea697cc7d8a67e3051cdf491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d85c961e0b29c0e4dbf479c117478cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2019d56bdbf0e585aaae65347901f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】过点P(-4,0)的动直线l与抛物线
相交于D、E两点,已知当l的斜率为
时,
.
(1)求抛物线C的方程;
(2)设
的中垂线在
轴上的截距为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a065bba08e0692325d27ab675d47d07.png)
(1)求抛物线C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】已知抛物线
的焦点为F,点
在抛物线C上.
(1)求抛物线C的方程及其准线方程;
(2)过点M的直线l与抛物线C相交于M,N两点,且
的面积为3,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71dab265ebd7236a6b8e2be7c0e11bac.png)
(1)求抛物线C的方程及其准线方程;
(2)过点M的直线l与抛物线C相交于M,N两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a5c35b41bb1a8fa59998a6dcc791f1.png)
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【推荐1】
为抛物线
:
上一点,过
作两条关于
对称的直线分别交
于
,
两点.
(1)证明:直线
的斜率为定值,并求出该定值;
(2)若
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2007972af3341f27fbc32ce62dfce5e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec68c680d1b8c8cfa98b48a27d2c46a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b1ef42dc8e1034dafa947ea9b640f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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【推荐2】(1)直线l过抛物线
的焦点,且与抛物线相交于
、
两点,证明:
;
(2)直线l过抛物线
的焦点,且与抛物线相交于
、
两点,点C在抛物线的准线上,且
轴,证明:直线AC经过原点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af529571cca0e6957a197fe3f878d419.png)
(2)直线l过抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2146aec59309d1544ece1d028a17e394.png)
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